The late Elizabeth Taylor’s Krupp diamond (33.19 carat, D colour, VS1 clarity) was auctioned off for a shocking 880,0000 USD. The diamond realized such a high price not only because it was large, but above all because of its unique characteristics. It is categorized as a Type IIa, with a value at least 50% higher than other diamonds. The international common standard for evaluating a diamond is the 4C’s (carat, clarity, colour and cut). But Type IIa diamonds are in a league of its own. Only 1% of all the diamonds produced from the world’s diamond mines is Type IIa.